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Finding the Fourth Proportional to 9,392.31, 12,955.14 and 7,149.15

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Solution

The fourth proportional to 9,392.31, 12,955.14 and 7,149.15 is: 9,861.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,392.31 : 12,955.14 = 7,149.15 : x
  2. Step 2: Convert to fraction form
    9,392.31/12,955.14 = 7,149.15/x
  3. Step 3: Cross multiply
    9,392.31x = 12,955.14 × 7,149.15
  4. Step 4: Simplify right side
    9,392.31x = 92,618,239.13
  5. Step 5: Solve for x
    x = 92,618,239.13/9,392.31
  6. Step 6: Final answer
    x = 9,861.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.